Which number represents the probability of an event that is very likely to occur?

A

0.12

B

1.3

C

0.89

d

0.09

A probability always lies bewteen 0 and 1. So, option B is not even a probability.

As for the others, probability 0 means that the even't cannot happen, whereas probability 1 means that event is certain. So, the bigger the number, the greater the probability (as one may expect).

Since 0.09 < 0.12 < 0.89, the greatest number represents the event that is more likely to occur.